[Audio] Unable to download streaming audio output

[virajkarandikar]

Describe the bug

I am using an output audio block with streaming=True. I call yield audio chunks in my callback function. Audio playback works fine.
But when I try to download the audio, nothing happens. After few mins a zero size file gets downloaded.

Have you searched existing issues? 🔎

• I have searched and found no existing issues

Reproduction

import gradio as gr
import numpy as np

def build_tts_ui():
    with gr.Blocks() as tts_ui:
        def generate_sine_tone(numsamples, sample_time, frequency):
            t = np.arange(numsamples) * sample_time # Time vector
            signal = 32767*np.sin(2*np.pi * frequency*t)
            return signal

        def text_to_speech():
            count = 5
            while count:
                signal = generate_sine_tone(16000, 1.0/16000, 440).astype(np.int16)
                count -= 1
                yield (16000, signal)

        synthesize_btn = gr.Button("Synthesize")
        output_audio = gr.Audio(label="Synthesized Speech", autoplay=True, show_edit_button=False, interactive=False, streaming=True)
        flag_btn = gr.Button("Flag")

        synthesize_btn.click(text_to_speech, None, [output_audio])

        tts_logger_callback = gr.CSVLogger()
        tts_logger_callback.setup([output_audio], "flagged/tts")
        flag_btn.click(lambda *args: tts_logger_callback.flag(args), [output_audio], None, preprocess=False, postprocess=False)

    return tts_ui


demo = build_tts_ui().queue()
demo.launch(server_name="0.0.0.0", server_port=7860)
# demo.launch(server_name="0.0.0.0", server_port=7860, share=False, ssl_certfile="cert/cert.pem", ssl_keyfile="cert/key.pem", ssl_verify=False, show_api=False)

Screenshot

No response

Logs

No activity is seen in the logs

System Info

Python 3.8
Gradio 4.7.1

Severity

Blocking usage of gradio

[virajkarandikar]

Any update here?

[virajkarandikar]

any update on this?

[virajkarandikar]

Ping...

[IguteChung]

+1

[abidlabs]

Closed via #8906. If you'd like to try it out, you can install gradio from this branch: #8843